package com.ruoyi.web.controller.common;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.dromara.x.file.storage.core.FileInfo;
import org.dromara.x.file.storage.core.FileStorageService;
import org.omg.CORBA.SystemException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 * 
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController
{
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    @Autowired
    private FileStorageService fileStorageService;//注入实列

    /**
     * 通用下载请求
     * 
     * @param fileName 文件名称
     * @param delete 是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete)
            {
                FileUtils.deleteFile(filePath);
            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }


//    /**
//     * 通用上传请求（单个）
//     */
//    @PostMapping("/upload")
//    public AjaxResult uploadFile(MultipartFile file) throws Exception {
//
//        try {
//            //做个校验
//            fileVerification(file);
//            // 指定oss保存文件路径
//            String objectName = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy/MM/dd")) + "/";
//            // 上传图片，成功返回文件信息
//            FileInfo fileInfo = fileStorageService.of(file).setPath(objectName).upload();
//            // 设置返回结果
//            AjaxResult ajax = AjaxResult.success();
//            ajax.put("url", fileInfo.getUrl());
//            ajax.put("fileName", fileInfo.getUrl());  //注意：这里的值要改为url，前端访问的地址,需要文件的地址 而不是文件名称
//            ajax.put("newFileName", fileInfo.getUrl());
//            ajax.put("originalFilename", file.getOriginalFilename());
//            return ajax;
//        } catch (Exception e) {
//            return AjaxResult.error(e.getMessage());
//        }
//    }
//
//    /**
//     * 通用上传请求（多个）
//     */
//    @PostMapping("/uploads")
//    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception
//    {
//
//        try {
//            // 指定oss保存文件路径格式：dkd-images/yyyy/MM/dd/
//            String objectNamePrefix = "dkd-images/" + LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy/MM/dd")) + "/";
//
//            List<String> urls = new ArrayList<>();
//            List<String> fileNames = new ArrayList<>();
//            List<String> newFileNames = new ArrayList<>();
//            List<String> originalFilenames = new ArrayList<>();
//
//            for (MultipartFile file : files) {
//                //做个校验
////                fileVerification(file);
//                // 上传图片 返回文件信息
//                FileInfo fileInfo = fileStorageService.of(file).setPath(objectNamePrefix).upload();
//
//                urls.add(fileInfo.getUrl());
//                newFileNames.add(fileInfo.getUrl()); // 注意这里的值需要改为Url，因为前端的访问地址会做一个判断，如果一个http开头就直接显示此图片
//                originalFilenames.add(file.getOriginalFilename());
//            }
//
//            Map<String, List<String>> map = new HashMap<>();
//            map.put("urls", urls);
//            map.put("fileNames", fileNames);
//            map.put("newFileNames", newFileNames);
//            map.put("originalFilenames", originalFilenames);
//
//            return AjaxResult.success(map);
//        } catch (Exception e) {
//            return AjaxResult.error(e.getMessage());
//        }
//    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception
    {
        try
        {


            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception
    {
        try
        {


            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }



    public void fileVerification(MultipartFile file) throws IOException {
        // 文件大小检查
        if (file.getSize() > 10 * 1024 * 1024) { // 最大10MB

            new Exception(StringUtils.format("图片过大,请重新图片 "));
        }

        // 文件类型检查
        String contentType = file.getContentType();
        List<String> allowedTypes = Arrays.asList("image/jpeg", "image/png", "image/gif");
        if (!allowedTypes.contains(contentType)) {
            new Exception(StringUtils.format("图片类型不正确,请重新上传 "));
        }

        // 文件名检查
        String originalFilename = file.getOriginalFilename();
        if (originalFilename == null || !(originalFilename.endsWith(".jpg") || originalFilename.endsWith(".png") || originalFilename.endsWith(".gif"))) {
            new Exception(StringUtils.format("文件名不正确,请重新上传 "));
        }

        // MIME类型检查
        String actualFileType = Files.probeContentType(Paths.get(file.getOriginalFilename()));
        if (!allowedTypes.contains(actualFileType)) {
            new Exception(StringUtils.format("属性不正确,请重新上传 "));
        }
    }
}
